// The MIT License (MIT)
//
// Copyright (c) 2022 Firebase
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE ignoreUnusedWarning OR OTHER DEALINGS IN THE
// SOFTWARE.
import { ResettableKeys, ResetValue } from "../../src/common/options";
import { expectNever, expectType } from "./metaprogramming";

describe("ResettableKeys", () => {
  it("should pick out keys with a type that includes ResetValue", () => {
    type A = { a: number; b: ResetValue; c: number | boolean | ResetValue };
    expectType<keyof ResettableKeys<A>>("b");
    expectType<keyof ResettableKeys<A>>("c");
  });

  it("should return an empty type if no keys are resettable", () => {
    type A = { a: number };
    expectNever<keyof ResettableKeys<A>>();
  });
});
